Polymyositis & Dermatomyositis Support Group
Polymyositis (PM) is a type of chronic inflammation of the muscles (inflammatory myopathy) related to dermatomyositis and inclusion body myositis. The inflammation is predominantly of the endomysium in polymyositis, whereas dermatomyositis is characterized by primarily perimysial inflammation.
No one here is a doctor. The source of the muscle twitching must be solved by the neurologist. Many people do have a twitch at the beginning of DM and some do not twitch. I was checked for Myasthenia Gravis which is a common DM overlap. Myasthenia Gravis can have muscle twitching and a symptom called eye drop. My twitching simply went away over time. Do tell the neurologist about the twitching so s/he can rule out or determine the cause of the twitch. It may also take some time for the twitch cause and diagnosis to unfold if it continues so be patient too.
DM will often have an overlapping condition. In my case, I have DM with Limited Scleroderma. I have a video that will help you understand autoimmune diseases. The video is one hour long so make popcorn. Dr. Tamiko Katsumoto MD discusses Sjogren's, DM/PM, Interstitial Lung, RA, Lupus, Scleroderma, Thyroid Disease, the requirements for diagnosis, autoantibodies, and medications for each disease. I know that you will find this helpful and it will answer a lot of questions. You can also pull this video up by title on google if it does not come up here:
Overlapping Conditions in Systemic Sclerosis - You Tube www.youtube.com/watch?v=3NFlz6U7zBY
It is very hard to sleep at the beginning of DM even without the twitch. If you are taking high doses of Prednisone, then sleep is difficult. You will also need to eat a lot of leafy green veggies and watch your blood sugars. High doses of Prednisone will cause high blood sugars. Avoid breads, corn, potatoes, rice, spaghetti, donuts, starches. Talk to the rheumatologist about your sleep issues too. I just learned to tough out my sleeping issues, but the rheumy would know what would offer for appropriate relief too.
I hope this helps. Best Wishes.